Insecticidal soap

Insecticidal soap is a homemade, environmentally friendly pesticide against aphids, spider mites and whiteflies.

Insecticidal soap – a homemade, environmentally friendly pesticide against aphids, spider mites and whiteflies. Easy to make by mixing 20 ml of liquid biodegradable soap and 20 ml of surgical spirit (aka rubbing alcohol, 70% isopropyl alcohol) with 1 liter of water. Spray over the plants to be treated. After five to seven days, repeat the treatment. Dishwasher soap and liquid hand soap are not soft soaps; Sea to Summit Wilderness Wash, Marcel’s Green Soap and RawGanic are. These soaps already contain quite a bit of water, keep that in mind. Use soft water; hard water negates the action of soap. Not all plants like soap: lathyrus does not, for example.

Insecticidal soap, photo: CC0 Public Domain